Season 1

Some 400,000,000 years after an advanced human civilization was destroyed by an alliance of planetary conquerers known as Warp Monarch, 12 direct descendants of the civilization's warriors (called Sazers) awaken their powers and join forces with the other members of one of their ancestors' four tribes: Flame, Wind, Earth and Water. Each Sazer is based on a Zodiac sign represented in an animal totem or spirit representation. At first, they wage war on each other, but after learning the truth of their ancestry and their reason for awakening, the GranSazer tribes unite to protect Earth from the Warp Monarch from once again extinguishing all life on the planet.

4億年前に絶滅したとされる幻の超古代文明。その優れた科学力が作り上げた戦闘システムが炎・風・大地・水の4つのトライブからなる12人のグランセイザーだ。 そのグランセイザーが次々と覚醒する。さらにグランセイザーが操る巨大ロボット・超星神もその巨体を現した。地球に何が起きているのか?人類滅亡の危機が迫る!